Why is it against the law for a man living in Delhi to be buried in Mumbai?

Why do we preferably have round manhole covers and not square ones?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What makes this number unique: 8,549,176,320?